The hallmark of Bono's celebrity activism has been a concern with gaining access to key political decision-makers. However, over the last year the focus of attention has turned away from a fixation with politicians at the apex of power in the traditional global establishment.

The celebrities' call to action on the famine in Somalia is welcome, but the bottom line is that these countries need sustained economic growth. Such strategies are not without risks, however. Businesses must not be permitted to abuse human rights. Foreign investment must not undermine sovereignty.